Service manual

TROUBLESHOOTING
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 1C-23
Valve Cover Area
Location Possible Causes
A. Rocker arm striking valve cover
Valve cover area, timed to one-half engine
B. Rocker arm out of adjustment
speed, noise could be confined to one
C. Worn rocker arm
cylinder or may be found in any multitude
of cylinders
D. Bent push rod
E. Collapsed filter
Cylinder Area
Location Possible Causes
A. Sticking valve
B. Carbon build-up
C. Connecting rod installed wrong
Cylinder area, may be confined to one
D. Bent connecting rod
cylinder or found in more than one
cylinder, timed to engine speed
E. Piston
cylinder, timed to engine speed
F. Piston rings
G. Piston pin
H. Cylinder worn
Camshaft Area
Location Possible Causes
A. Crankshaft timing sprocket
B. Timing chain
Camshaft area, front of engine,
C. Fuel Pump
timed to one half engine speed
D. Valve Lifter
E. Cam Bearings
A. Fuel Pump
Camshaft area, center of
engine, timed to one half
B. Valve Lifter
engine speed
C. Cam bearing
A. Distributor gear
Camshaft area, rear of engine,
B. Valve lifter
timed to one half engine speed
C. Cam bearings
A. Loss of oil pressure
Camshaft area, throughout
engine, timed to one half
B. Valve lifters
engine speed
C. Cam bearings
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